Soo the Tebex Integration Module works perfectly but i want to change like the primary color of the thing

like the navbar on the store page and the popups on it. Is that possible, i know a bit of css and html but when im searching for it, its in the scss (and i dont mean css i mean Scss) folder and i cant find that.... please help me 

Soo every time i try to go to my website on google chrome its says (Only with chrome other browsers do work):